Abstract：
:Performing RFA procedures under MR imaging involves two distinct processes: interactive guidance of the RF electrode into the targeted tumor and monitoring the effect of therapy. The justification for using MR imaging for electrode guidance is quite similar to its use to guide biopsy and aspiration procedures, where MR imaging offers advantages related to superior soft tissue contrast, multiplanar capabilities, and high vascular conspicuity that facilitate safe and accurate guidance in selected lesions. The major contribution of MR imaging to thermal ablation procedures is its ability to monitor tissue changes associated with the heating process instantaneously, an attribute that is not paralleled by any other currently available imaging modality. Such ability facilitates a controlled approach to ablation by helping to detect inadequately treated tumor foci for subsequent interactive repositioning of the RF electrode during therapy. As such, MR imaging guidance and monitoring enable treatment of the entire tumor on a single-visit basis while avoiding undue overtreatment and preserving often critically needed organ function. Although knowledge of interventional MR imaging concepts and familiarity with its technology and with the related safety issues are indispensable for interventional radiologists attempting thermal ablation procedures in the MR imaging environment, understanding the tissue basis of necrosis imaging is becoming an essential part of the knowledge base for the larger sector of general radiologists who are required to interpret the follow-up MR imaging scans of the increasing number of thermal ablation patients.
journal_name
Magn Reson Imaging Clin N Amjournal_title
Magnetic resonance imaging clinics of North Americaauthors
Nour SG,Lewin JSdoi
10.1016/j.mric.2005.04.007keywords:
subject
Has Abstractpub_date
2005-08-01 00:00:00pages
561-81issue
3eissn
1064-9689issn
1557-9786pii
S1064-9689(05)00039-5journal_volume
13pub_type
杂志文章,评审abstract：:MR imaging of the pancreas has evolved with better understanding of pathologic and radiologic correlation and with continued improvement in rapid-acquisition breath-hold or breathing-independent MR imaging techniques. MR imaging should be considered essential in the evaluation of pancreatic disease and particularly fo...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：2000-11-01 00:00:00
abstract：:Infection and noninfection inflammatory diseases commonly affect the foot and ankle; they have a significant impact on the cost of medical care and are a major source of referral for MR imaging evaluation. Recognition of the MR imaging appearance of the various manifestations of these disorders is important so that pr...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：2001-08-01 00:00:00
abstract：:In neonates and infants with congenital heart disease (CHD), cardiovascular magnetic resonance (CMR) is an established imaging modality in all patients in whom echocardiography does not provide sufficient information and definitive diagnosis. CMR is noninvasive, and does not involve vascular catheterization or ionizin...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章
doi：10.1016/j.mric.2011.08.005
更新日期：2011-11-01 00:00:00
abstract：:The principles underlying coronary MR angiographic pulse sequences are reviewed, including basic coronary anatomy, motion, and flow physiology. Coronary MR angiographic techniques can be subdivided into breath-hold (single or repeated) and nonbreath-hold techniques. The recent introduction of navigator pulses for real...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：1996-05-01 00:00:00
abstract：:Perineural tumor spread (PNS) is a mode of neoplastic spread whereby tumor cells use neural conduits to escape the borders of a primary tumor. MRI is generally favored over CT for evaluating PNS, and findings include obliteration of fat within skull base foramina, enlargement and enhancement of the involved nerves, an...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2012.05.006
更新日期：2012-08-01 00:00:00
abstract：:The motivations for developing MR-guided minimally invasive therapy include its excellent soft tissue contrast, tomographic imaging in any direction (as opposed to projection imaging as in fluoroscopy), the absence of ionizing radiation,the abundance of contrast mechanisms (including bright blood pulse sequences that ...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章
doi：10.1016/j.mric.2005.04.005
更新日期：2005-08-01 00:00:00
abstract：:The ability to simultaneously and comprehensively evaluate both articular and extra-articular structures represents a distinct advantage for MR imaging over all other diagnostic methods. This article reviews how the technique can demonstrate a wide spectrum of abnormalities in and around the shoulder, with an emphasis...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：1993-09-01 00:00:00
abstract：:The newer magnetic resonance (MR) imaging methods can give insights into the initiation, progression, and eventual treatment of osteoarthritis. Sodium imaging is specific for changes in proteoglycan (PG) content without the need for an exogenous contrast agent. T1ρ imaging is sensitive to early PG depletion. Delayed g...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2011.02.010
更新日期：2011-05-01 00:00:00
abstract：:The prevalence of cerebrovascular disease in children is much higher than most clinicians and neuroradiologists suspect, when all primary and secondary causes are considered. Most signal alterations found on MR imaging in childhood central nervous system pathologic conditions result from causes other than a decrease i...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：2001-02-01 00:00:00
abstract：:Continuous technologic developments and research have increased the clinical applications of MT, HASTE, and FLAIR imaging in neuroradiology. HASTE has become the MR imaging sequence of choice for fetal neuroimaging. Other promising uses, such as for diffusion-weighted imaging, have not been fully exploited. FLAIR has ...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/s1064-9689(03)00058-8
更新日期：2003-08-01 00:00:00
abstract：:Bone marrow abnormalities around the knee are encountered frequently when performing MR imaging. Some of these so-called abnormalities may represent normal variations of the bone marrow contents and have no clinical significance. On other occasions, MR imaging may be the only technique that demonstrates a bone marrow ...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：1994-08-01 00:00:00
abstract：:Contrast-enhanced mammography (CEM) is a contrast-enhanced modality for breast cancer detection that utilizes iodinated contrast and dual-energy imaging performed on a digital mammography unit with only slight modifications. It is approved by the US Food and Drug Administration, commercially available, and in routine ...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2017.12.005
更新日期：2018-05-01 00:00:00
abstract：:Diffusion and perfusion MR imaging have proven to be highly useful in the clinical description and understanding of acute and hyperacute ischemic stroke. In this article, the authors give a brief overview of the basic concepts of diffusion and perfusion imaging and describe some of the current developments, applicatio...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2009.02.001
更新日期：2009-05-01 00:00:00
abstract：:MR imaging can be extremely helpful in evaluating congenital and acquired deformities of the foot and ankle. Knowledge of the normal developmental anatomy of the foot and ankle is important to accurately identify abnormalities versus normal variants. The foot and ankle may be abnormal because of trauma, infection, tum...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：1998-08-01 00:00:00
abstract：:Imaging variants of the elbow and pitfalls can be disconcerting and can lead to diagnostic mistakes. Inhomogeneities in the magnetic field and coil position can result in signal changes that may simulate abnormality. Bone signal and morphology variants, such as the islands of red marrow and the pseudodefect of the cap...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2010.07.005
更新日期：2010-11-01 00:00:00
abstract：:This article reviews the complex normal anatomy of the hip joint and its surrounding structures on MR imaging, including MR arthrography.Thorough knowledge of the normal appearance of the marrow and osseous and articular anatomy as well as the ligaments, tendons, and surrounding muscles of the hip is essential for ima...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2005.08.012
更新日期：2005-11-01 00:00:00
abstract：:Although MR imaging has achieved a clear role in the assessment of focal benign and malignant hepatic lesions, its role in the evaluation of inflammatory processes in the liver is less well defined and studied. Many inflammatory diseases in the liver have no characteristic or specific imaging findings with MR imaging....
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：1997-05-01 00:00:00
abstract：:This article reviews the utility of MR imaging in the evaluation of liver transplantation. Issues related to the prospective transplant donor and recipient, such as inclusion and exclusion criteria, indications and contraindications, and imaging of donor anatomy and recipient pathology, are discussed. Post-transplanta...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：2001-11-01 00:00:00
abstract：:Pre- and postoperative evaluation, serial follow-up studies, and screening examinations of the aorta are performed with noninvasive cross-sectional imaging modalities like CT and MR imaging. MR imaging allows for dedicated comprehensive evaluation without exposure to iodinated contrast or ionizing radiation. The addit...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2015.01.004
更新日期：2015-05-01 00:00:00
abstract：:Neuroimaging plays a critical role in the management of patients with acute stroke syndrome, with diagnostic, therapeutic, and prognostic implications. A multiparametric magnetic resonance (MR) imaging protocol in the emergency setting can address both primary goals of neuroimaging (ie, detection of infarction and exc...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2015.11.002
更新日期：2016-05-01 00:00:00
abstract：:The need to develop faster imaging techniques has led to the implementation of fast spin-echo imaging, EPI, and hybrid imaging techniques. This article discusses two of these faster imaging techniques, fast fluid-attenuated inversion-recovery (FLAIR) imaging and half-Fourier acquisition single-shot turbo spin-echo (HA...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：1998-02-01 00:00:00
abstract：:Cystic lesions around the knee comprise a diverse group of entities, ranging from benign cysts to complications of underlying diseases such as infection, arthritis, and malignancy. Their diverse causes result in varied prognoses and therapeutic options. Although the presentation of cystic masses may be similar, their ...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2007.02.001
更新日期：2007-02-01 00:00:00
abstract：:The main neonatal stroke syndromes discussed in this article are: arterial ischemic stroke (AIS), including perinatal AIS, and "presumed" perinatal AIS; cerebral venous thrombosis, including cortical vein and venous sinus thrombosis and germinal matrix hemorrhage/periventricular hemorrhagic infarction; and intraparenc...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2011.10.001
更新日期：2012-02-01 00:00:00
abstract：:The imaging of rectal cancer has evolved noticeably over the past 2 decades, paralleling the advances in therapy. The methods for imaging rectal cancer are increasingly used in clinical practice with the purpose of helping to detect, characterize and stage rectal cancer. In this setting, MR imaging emerged as the most...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2019.09.003
更新日期：2020-02-01 00:00:00
abstract：:The thoracic venous system can be visualized and characterized well with MR imaging. In this article, MR sequences that are suited for this purpose (including the more advanced techniques) are reviewed. The normal thoracic venous anatomy and a brief summary of its embryogenesis is provided. The appearances of congenit...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章
doi：10.1016/j.mric.2008.02.017
更新日期：2008-05-01 00:00:00
abstract：:Wilms' tumor is the most common solid renal tumor in children. Imaging plays a crucial role in the evaluation of the primary tumor and regional and metastatic disease. This article reviews the biologic, clinical, and MR imaging features of this tumor and other renal tumors that can mimic Wilms' tumor. ...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2008.04.009
更新日期：2008-08-01 00:00:00
abstract：:This article examines technical and clinical issues related to MR guided biopsy of the breast. Designed features of breast biopsy instrumentation are discussed. Procedures for performing breast biopsies as well as clinical indications are also explored. ...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章
doi：
更新日期：1994-11-01 00:00:00
abstract：:MR imaging is a useful modality for evaluating diseases of the bladder. MR imaging can detect and stage bladder cancer by determining the presence and depth of muscle invasion. Direct multiplanar imaging and superb soft-tissue contrast make MR imaging an ideal modality for evaluating less common neoplastic diseases of...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2004.03.010
更新日期：2004-08-01 00:00:00
abstract：:Technical advances in MR imaging of sports-related bone and joint derangement have improved our ability to evaluate these problems. This article discusses current utilization of MR imaging, advances in local coils, pulse sequences and parameters, and reviews current aspects and indications for MR arthrography. ...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：
更新日期：1999-02-01 00:00:00
abstract：:MR colonography has a high diagnostic accuracy for detecting Crohn disease (CD) activity and determining the extent and severity of lesions. In the setting of stricturing CD, MR colonography can provide a detailed map of the lesions, which is useful for clinical decision making. MR colonography can be used as an alter...
journal_title：Magnetic resonance imaging clinics of North America
pub_type： 杂志文章,评审
doi：10.1016/j.mric.2013.07.011
更新日期：2014-02-01 00:00:00
